WO2002054767A3 - Method and apparatus for identifying a vertical blanking interval in a television signal - Google Patents

Method and apparatus for identifying a vertical blanking interval in a television signal Download PDF

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Publication number
WO2002054767A3
WO2002054767A3 PCT/US2001/049940 US0149940W WO02054767A3 WO 2002054767 A3 WO2002054767 A3 WO 2002054767A3 US 0149940 W US0149940 W US 0149940W WO 02054767 A3 WO02054767 A3 WO 02054767A3
Authority
WO
WIPO (PCT)
Prior art keywords
vbi
signal
vertical
copy protection
frame rate
Prior art date
Application number
PCT/US2001/049940
Other languages
French (fr)
Other versions
WO2002054767A2 (en
Inventor
Ronald Quan
Original Assignee
Macrovision Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Macrovision Corp filed Critical Macrovision Corp
Priority to AT01989255T priority Critical patent/ATE302528T1/en
Priority to EP01989255A priority patent/EP1356679B1/en
Priority to JP2002555528A priority patent/JP2004517567A/en
Priority to DE60112808T priority patent/DE60112808T2/en
Priority to AU2002243362A priority patent/AU2002243362A1/en
Priority to DK01989255T priority patent/DK1356679T3/en
Publication of WO2002054767A2 publication Critical patent/WO2002054767A2/en
Publication of WO2002054767A3 publication Critical patent/WO2002054767A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91314—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91371—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video color burst signal being modified

Abstract

Various techniques and associated embodiments are disclosed for providing defensive measures against 'black boxes', wherein the techniques utilize unconventional schemes for detecting the vertical blanking interval (VBI) of a video signal containing a copy protection signal. The unconventional schemes would be of particular interest to the black boxes, which must locate the VBI to generate a vertical rate signal in order to perform the task of illegally removing the copy protection signal. The unconventional schemes utilize the particular characteristics or peculiarities of the video signals in the VBI to detect the VBI and generate therefrom a reliable vertical or frame rate signal. The characteristics include various pulse spacings and/or pulse widths which may occur in specific lines in the VBI, and which may be detected to allow deriving the reliable vertical or frame rate signal. Alternatively, techniques for modifying the characteristic signals of the VBI also are disclosed to prevent the derivation of a correct or reliable vertical or frame rate signal utilizing the unconventional schemes of detection of previous mention. In a third alternative, the reliable vertical rate or frame signal is utilized to attenuate, defeat or otherwise modify an anti-copy protection signal or a normal video signal.
PCT/US2001/049940 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical blanking interval in a television signal WO2002054767A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT01989255T ATE302528T1 (en) 2001-01-03 2001-12-31 METHOD AND DEVICE FOR IDENTIFYING A VERTICAL BLANKING INTERVAL IN A TELEVISION SIGNAL
EP01989255A EP1356679B1 (en) 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical blanking interval in a television signal
JP2002555528A JP2004517567A (en) 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical blanking interval of a television signal
DE60112808T DE60112808T2 (en) 2001-01-03 2001-12-31 METHOD AND DEVICE FOR IDENTIFICATION OF A VERTICAL EXPOSURE INTERVAL IN A TELEVISION SIGNAL
AU2002243362A AU2002243362A1 (en) 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical blanking interval in a television signal
DK01989255T DK1356679T3 (en) 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical extinguishing period in a television signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/754,698 2001-01-03
US09/754,698 US6931547B2 (en) 2001-01-03 2001-01-03 Method and apparatus for identifying a vertical blanking interval in a television signal

Publications (2)

Publication Number Publication Date
WO2002054767A2 WO2002054767A2 (en) 2002-07-11
WO2002054767A3 true WO2002054767A3 (en) 2003-03-06

Family

ID=25035918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/049940 WO2002054767A2 (en) 2001-01-03 2001-12-31 Method and apparatus for identifying a vertical blanking interval in a television signal

Country Status (8)

Country Link
US (2) US6931547B2 (en)
EP (1) EP1356679B1 (en)
JP (1) JP2004517567A (en)
AT (1) ATE302528T1 (en)
AU (1) AU2002243362A1 (en)
DE (1) DE60112808T2 (en)
DK (1) DK1356679T3 (en)
WO (1) WO2002054767A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7110042B1 (en) * 2001-11-07 2006-09-19 Pixelworks, Inc. Synchronization signal decoder and associated method
US7599604B2 (en) * 2001-12-14 2009-10-06 Thomson Licensing Asynchronous copy protection detector
US20050111661A1 (en) * 2002-02-01 2005-05-26 Arie Wijnen Anti-copy protection for a video signal
JP3789838B2 (en) * 2002-03-26 2006-06-28 三洋電機株式会社 Display device
US8280049B2 (en) * 2008-08-27 2012-10-02 Rovi Solutions Corporation Method and apparatus for synthesizing copy protection for reducing/defeating the effectiveness or capability of a circumvention device
US8374490B2 (en) * 2010-02-24 2013-02-12 Rovi Technologies Corporation Method and apparatus for receiving metadata, EPG, or IPG signals in an integrated circuit for control purposes
US11177793B2 (en) * 2017-08-09 2021-11-16 Planar Systems, Inc. Clock synthesis circuitry and associated techniques for generating clock signals refreshing display screen content

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963865A (en) * 1975-06-04 1976-06-15 Trans-American Video, Inc. Anti-piracy method and system
US4100575A (en) * 1976-03-22 1978-07-11 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4631603A (en) * 1985-04-17 1986-12-23 Macrovision Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof
US4803552A (en) * 1986-12-03 1989-02-07 Xantech Corporation Vertical blanking interval standardizer circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963865A (en) * 1959-07-07 1960-12-13 Ethyl Corp Cyclic extrusion apparatus
US5194965A (en) * 1983-11-23 1993-03-16 Macrovision Corporation Method and apparatus for disabling anti-copy protection system in video signals
US4890319A (en) * 1984-09-21 1989-12-26 Scientific-Atlantic, Inc. Method for controlling copying of protected information transmitted over a communications link
JP3613858B2 (en) * 1995-10-26 2005-01-26 ソニー株式会社 Television signal transmission or recording method and recording apparatus
US6690880B1 (en) * 1999-05-21 2004-02-10 Ati International, Srl Method and apparatus for copy protection detection in a video signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963865A (en) * 1975-06-04 1976-06-15 Trans-American Video, Inc. Anti-piracy method and system
US4100575A (en) * 1976-03-22 1978-07-11 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4631603A (en) * 1985-04-17 1986-12-23 Macrovision Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof
US4803552A (en) * 1986-12-03 1989-02-07 Xantech Corporation Vertical blanking interval standardizer circuit

Also Published As

Publication number Publication date
EP1356679A2 (en) 2003-10-29
DK1356679T3 (en) 2005-12-19
AU2002243362A1 (en) 2002-07-16
US20020085717A1 (en) 2002-07-04
US20050238169A1 (en) 2005-10-27
US6931547B2 (en) 2005-08-16
WO2002054767A2 (en) 2002-07-11
US7100209B2 (en) 2006-08-29
ATE302528T1 (en) 2005-09-15
DE60112808T2 (en) 2006-06-01
EP1356679B1 (en) 2005-08-17
DE60112808D1 (en) 2005-09-22
JP2004517567A (en) 2004-06-10

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